Originally Posted by
Michael Angelo
True, The Campy Syncro system was a bit finiky to say the least. Different, index rings matched to Freewheels. Not many people knew this and never got them to work Correctly. It takes a blue 7 speed index ring to work with a 7 speed Regina Syncro 90S, and a Green 7 speed index ring to work with Shimano UG freewheels.
I have never heard that?? Everything I have read shows the index rings were designed around the different Campy derailleurs and the number of speeds. Campy shows a spread sheet like below but they are primarily concerned with derailleur type, speeds and what chains work best with which freewheels; nothing about index rings being freewheel specific..
